chore: add imports in book (#1099)

* chore: add imports in book

* fix: bad fmt

* fix: fmt

* chore: save an import

book/src/custom-extensions/algebra.md

@@ -7,20 +7,22 @@ The functional part is provided by the `openvm-algebra-guest` crate, which is a
 ## Available traits and methods
 
 - `IntMod` trait:
-    Defines the type `Repr` and constants `MODULUS`, `NUM_LIMBS`, `ZERO`, and `ONE`. It also provides basic methods for constructing a modular arithmetic object and performing arithmetic operations.
-    - `Repr` typically is `[u8; NUM_LIMBS]`, representing the number's underlying storage.
-    - `MODULUS` is the compile-time known modulus.
-    - `ZERO` and `ONE` represent the additive and multiplicative identities, respectively.
-    - Constructors include `from_repr`, `from_le_bytes`, `from_be_bytes`, `from_u8`, `from_u32`, and `from_u64`.
+  Defines the type `Repr` and constants `MODULUS`, `NUM_LIMBS`, `ZERO`, and `ONE`. It also provides basic methods for constructing a modular arithmetic object and performing arithmetic operations.
+
+  - `Repr` typically is `[u8; NUM_LIMBS]`, representing the number's underlying storage.
+  - `MODULUS` is the compile-time known modulus.
+  - `ZERO` and `ONE` represent the additive and multiplicative identities, respectively.
+  - Constructors include `from_repr`, `from_le_bytes`, `from_be_bytes`, `from_u8`, `from_u32`, and `from_u64`.
 
 - `Field` trait:
-    Provides constants `ZERO` and `ONE` and methods for basic arithmetic operations within a field.
+  Provides constants `ZERO` and `ONE` and methods for basic arithmetic operations within a field.
 
 ## Modular arithmetic
 
 To [leverage](./overview.md) compile-time known moduli for performance, you declare, initialize, and then set up the arithmetic structures:
 
 1. **Declare**: Use the `moduli_declare!` macro to define a modular arithmetic struct. This can be done multiple times in various crates or modules:
+
 ```rust
 moduli_declare! {
     Bls12_381Fp { modulus = "0x1a0111ea397fe69a4b1ba7b6434bacd764774b84f38512bf6730d2a0f6b0f6241eabfffeb153ffffb9feffffffffaaab" },
@@ -44,6 +46,7 @@ This step enumerates the declared moduli (e.g., `0` for the first one, `1` for t
 3. **Setup**: At runtime, before performing arithmetic, a setup instruction must be sent to ensure security and correctness. For the \\(i\\)-th modulus, you call `setup_<i>()` (e.g., `setup_0()` or `setup_1()`). Alternatively, `setup_all_moduli()` can be used to handle all declared moduli.
 
 **Summary**:
+
 - `moduli_declare!`: Declares modular arithmetic structures and can be done multiple times.
 - `moduli_init!`: Called once in the final binary to assign and lock in the moduli.
 - `setup_<i>()`/`setup_all_moduli()`: Ensures at runtime that the correct modulus is in use, providing a security check and finalizing the environment for safe arithmetic operations.
@@ -90,27 +93,42 @@ Here, `mod_idx` refers to the index of the underlying modulus as initialized by
 
 3. **Setup**: Similar to moduli, call `setup_complex_<i>()` or `setup_all_complex_extensions()` at runtime to secure the environment.
 
+### Config parameters
+
+For the guest program to build successfully, all used moduli must be declared in the `.toml` config file in the following format:
+
+```toml
+[app_vm_config.modular]
+supported_modulus = ["115792089237316195423570985008687907853269984665640564039457584007908834671663"]
+
+[app_vm_config.fp2]
+supported_modulus = ["115792089237316195423570985008687907853269984665640564039457584007908834671663"]
+```
+
+The `supported_modulus` parameter is a list of moduli that the guest program will use. They must be provided in decimal format in the `.toml` file.
+
 ### Example program
 
 Here is a toy example using both the modular arithmetic and complex field extension capabilities:
+
 ```rust
 #![cfg_attr(not(feature = "std"), no_main)]
 #![cfg_attr(not(feature = "std"), no_std)]
 
-use openvm_algebra_guest::IntMod;
+use openvm_algebra_guest::{IntMod, moduli_setup::*};
 
 openvm::entry!(main);
 
 // This macro will create two structs, `Mod1` and `Mod2`,
 // one for arithmetic modulo 998244353, and the other for arithmetic modulo 1000000007.
-openvm_algebra_moduli_setup::moduli_declare! {
+moduli_declare! {
     Mod1 { modulus = "998244353" },
     Mod2 { modulus = "1000000007" }
 }
 
 // This macro will initialize the moduli.
 // Now, `Mod1` is the "zeroth" modular struct, and `Mod2` is the "first" one.
-openvm_algebra_moduli_setup::moduli_init! {
+moduli_init! {
     "998244353", "1000000007"
 }
 
@@ -141,16 +159,26 @@ pub fn main() {
 }
 ```
 
-### Config parameters
+To have the correct imports for the above example, add the following to the `Cargo.toml` file:
 
-For the guest program to build successfully, all used moduli must be declared in the `.toml` config file in the following format:
+```toml
+[dependencies]
+openvm = { git = "https://github.com/openvm-org/openvm.git" }
+openvm-platform = { git = "https://github.com/openvm-org/openvm.git" }
+openvm-algebra-guest = { git = "https://github.com/openvm-org/openvm.git" }
+openvm-algebra-complex-macros = { git = "https://github.com/openvm-org/openvm.git" }
+serde = { version = "1.0.216", default-features = false }
+```
+
+Here is the full `openvm.toml` to accompany the above example:
 
 ```toml
+[app_vm_config.rv32i]
+[app_vm_config.rv32m]
+[app_vm_config.io]
 [app_vm_config.modular]
-supported_modulus = ["115792089237316195423570985008687907853269984665640564039457584007908834671663"]
+supported_modulus = ["998244353","1000000007"]
 
 [app_vm_config.fp2]
-supported_modulus = ["115792089237316195423570985008687907853269984665640564039457584007908834671663"]
+supported_modulus = ["998244353","1000000007"]
 ```
-
-The `supported_modulus` parameter is a list of moduli that the guest program will use. They must be provided in decimal format in the `.toml` file.